Safety device for feed rolls



Dec- 7 1 1,610,046

J. A. FROSSARD ET AL SAFETY DEVICE FOR FEED ROLLS Filed March 1, 1926 Lama relax 9 Geoye wn Patented Dec. 7, 1926.

. UNITED STATES PATENT ()FFFlQE.

JOHN A. FOSSARD, OF PEPPERELL, AND GEORGE LAMOUREUX, OF WORCESTER, MASSACHUSETTS.

SAFETY DEVICE FOR FEED ROLLS.

Application filed March 11', 1225. Serial No. 93,989.

Our invention relates to safety devices for feed rolls, and is particularly adapted for use in connection with an arrangement of rolls usually employed on paper calendering machines. In such calendering machines it is essential that the web of paper be fed into the rolls by hand while the rolls are rotating, and unless very great caution is used, the operator is very likely to get his fingers caught between the rolls and be badly injured.

By our invention there is provided an extremely simple and eifective safety device comprising a guard, or a number of guards, adapted to be placed in front of each set of rolls, each guard serving the double purpose of assisting the operator in guiding the paper between the rolls, and at the same time effectively preventing movement of the operators fingers far enough between the rolls to be caught and pinched. The above and other advantageous features of our invention will hereinafter more fully appear, reference being had to the accompanying drawings, in which- Fig.1 is a vertical sectional view taken through a paper calendering machine illustrating portions of several rolls of the machine provided with our invention.

Fig. 2 is a perspective plan view of our safety device.

Like reference characters refer to like parts in the different figures.

Referring first to Fig. 1, a web of paper 1 is shown as having been passed between the rolls 2 and 3 of a calendering machine, the end of the paper 1 being shown as about to be guided by the operator between the rolls 3 and 4. The rolls 2, 3 and 4 may be mounted in any suitable .manner between side frames 5, 5 in accordance with the usual mounting of rolls in calendering machines.

A safety device, or series of such devices embodying our invention, is used in connection with each pair of rolls 2 and 3 and 3 and 4 respectively, the devices being carried by angle bars 6 extending substantially parallel to the axes of rotation of the rolls. Each bar 6 is supported at its ends by brackets 7 angularly adjustable on plates 8 by means of slots 9. Each plate 8 is in turn ad j ustable on its side frame 5 by means of slots 10. Each bar 6 carries a number of stiff meta-l guards 11 which extend in the direotion of the rolls as far as possible into the space between a pair of rolls, without touchmg either of said rolls, and each guard 11 terminates in an upturned portion 12 substantially at right angles to the main portion of the guard.

Each bar 6 also carries a number of flexible paper guides 13 corresponding in number to the guards 1.1,each guard 11 and guide 13 constituting in effect a complete safedevice. Each guide 13 is bent upwardly where it leaves the supporting bar 6, so that normally each guide 13 is inclined upwardly w th respect to its guard 11, as shown in F 2. \Vith the guides 13 in their normal raised position, it is apparent that as the operator directs the paper around the pe riphery of the roll 3 into the space between the rolls 3 and 4, the guides 13 will serve to direct the paper into the bite of the rolls 3 and 4. It is also apparent that as the operator follows around the lower periphery of the roll 3 with his fingers, the guides 13 will yield in response to the pressure of the operators finger tips. Therefore, should the movement of the roll 3 tend to draw the operators fingers between the rolls 3 and 4, the resilient guides 13 will be pressed downwardly into engagement with the guards 11 and the tips of the operators fingers will engage the upturned portions 12, as shown in the lower portion of Fig. 2, thus preventing injury to the operators fingers. As previously pointed out, the guards 11 possess considerable rigidity, so even though the operator finger tips are pressed against the upturned portions 12- with considerable force, the guards 11 effectively prevent further movement of the fingers between the rolls 3 and 4. As the operators finger tips engage the guards 11, it is also evident that the operators finger nails will exhibit no tendency to ride up over the upturned portions 12, owing to the sharp angle which these portions 12 make with the body portion of the guard 11 and the unyielding nature of the guard itself.

It is evident that each bar 6 can be readily adjusted to position the safety devices in proper relation to the associated pair of rolls by means of the brackets 7 and plates 8. The slots 9 in the brackets 7 permit angular adjustment about the longitudinal axis of the bar 6, whilethe slots 10 in the plates S p rmit the bar 6 and its safety devices to be shifted bodily towards and away from the rolls.

o claim:

1. The combination with a pair of feed rolls, of a safety device disposed between said rolls comprising a stiff guard and a yieldable guide normally inclined upwardly from the surface of said guard.

13. The combination with a pair of feed rolls, of a safety device disposed between said rolls comprising a stiff guard terminating in an upturned portion, and a yieldable guide upwardly inclined from said guard and tern'iinating in advance of said upturned portion.

The combination with a pair of feed rolls, of a safety device disposed between said rolls comprising a stiff guard terminating in an upturned portion, and a guide upwardly inclined from said guard and adapted to yield downwardly in response to pressure to aposition in front of said upturned portion.

4. The combination with a pair of feed rolls, of a safety device comprising a yieldable member extending towards said rolls for guiding material therebetween and a relatively rigid guard member disposed below said yieldable member for preventing the movement of the operators fingers between said rolls.

5. The combination with a pair of feed rolls of a safety device comprising a yieldable member extending towards said rolls for guiding material therebetweeu said member being adapted to yield in response to the pressure of the operators fingers, and a relatively rigiu guard member disposed below said yieldable member and providing an upturned portion to prevent movement of the operators fingers between said rolls.

(5. The combination with a pair of feed rolls, of a bar e ending parallel to the longitudinal axis of said rolls, a safety device carried by said bar comprising a yieldable member and a stiff guard member extending between said rolls, and means for adjusting said bar angularly and laterally to position said safety device.

JOHN A. FEOSSARD. GEORGE LAMOUREUX. 

